This stuff is so mind-bending and—well that's not actually true. My mind can't bend this way; it's more like I am considering the possibility that other minds might, and THAT's what's impressive. Anyway it's also very well-conveyed in Quanta Magazine. Talk about an organization that's Doing the Dang Thing. https://www.quantamagazine.org/why-black-hole-interiors-grow-forever-20181206/